add erlang, more-complex shell examples

- some Erlang and escript files
 - .escript extension
 - .erlang extension
 - shell script with %, ##, name tokens

test/test_tokenizer.rb

@@ -95,6 +95,7 @@ class TestTokenizer < Test::Unit::TestCase
     assert_equal "SHEBANG#!ruby", tokenize(:"Ruby/ruby2.script!")[0]
     assert_equal "SHEBANG#!node", tokenize(:"JavaScript/js.script!")[0]
     assert_equal "SHEBANG#!php", tokenize(:"PHP/php.script!")[0]
+    assert_equal "SHEBANG#!escript", tokenize(:"Erlang/factorial.script!")[0]
     assert_equal "echo", tokenize(:"Shell/invalid-shebang.sh")[0]
   end